You can tell the "USRP source" block to tune to a specific frequency
on a specific time with a "GNU Radio message passing" message. That
would be how I'd recommend to implement a scanner.
They're also used for pushing other kinds of data around, yes :)
Best regards,
Marcus
On 09.02.2016 00:13, Abhinav Jadon
wrote:
Hi Marcus,
I was reading your reply. I had implemented a similar
system but on a different band (TV).
I did not understand this section of your reply.
If you actually want to
retune (e.g. because your device bandwidth is
smaller than the Downlink you want to find unused channels
in, or
because you want to do EGSM900 and 1800), then things get
slightly more
complicated, and you'll probably end up using message
passing and stream
tags. Still not "complex", but not as conceptually
trivial.
Why do we require message passing and stream tags for scanning
a frequency band ?
Aren't they supposed to be used for decoding bursty
data/communication ?
Can you please elaborate on this further ?
Thanks
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